package com.tea.teawebsite.component;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginHandlerInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //判断用户是否登陆状态，如果是登陆可以访问，否则，提示没有权限，跳转到登陆界面
        Object user=request.getSession().getAttribute("main");
        if(user==null){
            //未登录
            request.setAttribute("msg","没有权限，请先登录");
            request.getRequestDispatcher("/").forward(request,response);
            return false;
        }else {
            //已登录
            return true;
        }

    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

    }
}
